Type-writing machine.



c. B. YAw. TYPE WRITING MACHINE. APPLICATION lFILED DEC.2. i914.

l ,22 l II. 26. Patented Apr.- 3, 1917.

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CLIO B; YAW, OF ARLINGTON, NEEV'JERSEY, ASSIGNOR TO REMINGTON TYPEWRITERCOMPANY, OF ILION, NE/V YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Apr. 3,1917.

To all whom t may concern.'

Be it known that 1, CLIO B. YAW, citizen of the United States, andresident of Arlington, in the county of Hudson and State of New Jersey,have invented certain new and usefnl Improvements in Typel/VritingMachines, of which the following is a specification.

My present invention relates to line spacing mechanism for typewritingmachines and its principal object is to provide new and improvedmechanism of the character specified.

To the above and other ends my invention consists in the features ofconstruction, combinations of devices and arrangements of partshereinafter described and particularly pointed out in the claims.

In the accompanying drawings illustrating the preferred form of myinvention,

Figure 1 is a fragmentary plan View partly in horizontal section showingthe platen ofa typewriting machine embodying my invention.

Fig. 2 is an end elevation viewed from the left showing the platencarriage and line spacing mechanism for the platen, the platen itselfbeing removed.

Fig. 3 is a vertical sectional view taken on a plane indicated by thedotted line in Fig. 2 and looking in the direction of the p arrow atsaidV line.

Fig. 4 is a fragmentary plan View showing the right-hand end portion ofthe platen.

Fig. 5 is a perspective view of the line spacing pawl or dog and itsmounting.

Fig. 6 is a fragmentary detail view showing the line spacing pa-wl inarrested position after operation.

Fig. 7 is an enlarged sectional detail View showing the detent devicesfor the line space adjuster or regulator.

As appears from Fig. 2 a stationary guide rail 1 grooved at its top andbottom to receive anti-friction balls 2 cooperates through said ballswith the slide bar 3 of a carriage which further includes end bars fixedto said slide bar, the right-hand end bar 4 being shown. Pivotallyconnected at 5 to the end bar 4 is a lug 62L projecting from a cap orhousing 6 comprised in a platen frame which further includes cross rods7 and 7adetachably iiXed to said cap. The cross rod 7 is connectedthrough pairs of links 8 and 9, (the right-hand pair only being shown)with angular plates 10 iixed to the slide bar 3. The parts or links 8and 9 are included in mechanism for moving the platen and its frame onthe carriage or truck comprising the slide bar 3 with which mechanismthe present invention is not specifically concerned. In addition to thecap 6 and cross rod 7 the platen frame further comprises a left-hand endportion 11 which provides a bearing for the left-hand section or portion12 of the platen shaft or axle, the.

right-hand section or portion whereof is indicated by the numeral 13.rFhe platen 14 is provided at its left-hand end with an ordinary platenhead 15 which bears a fixed relationship with the section or stub Shaft12. At the right-hand end of the platen is arranged a line spacingratchet wheel 16 provided with peripheral teeth 17 and crown teeth 18.The ratchet wheel is housed within the cap 6 and is operativelyconnected with the platen preferably by clutch devices correspondingwith those found in the Remington No. 10 typewriting machine but notshown herein. By pressing in the usual linger piece 19 secured to theaxle 13 said axle may be moved inward endwise to render said clutchdevices inoperative and disconnect the platen from its ratchet wheel.Cooperative with the teeth 17 at the under side of the ratchetv wheel isa detent roller 20 mounted ona spring arm 21 which is screwed orotherwise secured to the cross bar 7, the roll coperatingV with theteeth 17 through a slot 22 cut in the under side of the cap 6. The shaft13 bears in an opening bored through the hub portion 6b of the cap 6 andalso bears in a flanged bushing 23 which, as clearly appears in Fig. 3,isthreaded into the inner face of the cap 6 and is rigid with said cap.For conveniently detaching and attaching the bushing the outer face ofits iiange or head 24 is provided with a nick or slot 25 to receive ascrew driver. The bushing forms, in effect, an inner hub for the cap andprovides a bearing for a dog or pawl carrier designated las a whole bythe reference numeral 26, as best shown in Fig. 5. The pawl carrierbears rotatably on the bushing 23 so that it is mounted co-aXially withthe platen and is provided at its outer or free end with a radial slot27 forming two separated arms between which is arranged an actuatingdevice or pawl 28 pivoted on a pin 29 which bridges the slot. A spring30 confined between the pawl and the bottom of the slot 27 tendsconstantly to turn the pawl or actuating member 28 on its pivot 29 andthrow the upper end of the pawl into engagement with the teeth 18. Astop pin 31 projecting from the side of the pawl above its pivotcontacts with the face of the carrier to limit this movement of thepawl. The upper end of the pawl is approximately lo'Zenge-shaped being`beveled at opposite sides as indicated at 32 and 33, thereby providingat the inner side of the pawl a tooth 34 for coperation with the teeth18. Connected to a lug 35 extending downward from the carrier 26 is theforward end of a draw spring 36 which at its rear end is anchored to alateral `pin 37 on the housing 6. This spring tends constantly to throwthe upper portion of the pawl carrier forward about its pivot andnormally maintains the pawl carrier in engagement with astop pin 38projecting laterally inwardY from the inner face of the housing. Inorder to turn the pawl carrier to effect line space movements, means areprovided comprising a series of beveled teeth 39 formed on a coned partor member 40 which is rigid with the pawl carrier 26 and may be formed'integrally therewith but for convenience of manufacture is preferablymade separate and then is suitably fixed to the outerV face of the pawlcarrier. When thus manufactured the hub of the piece 40 may be forcedinto an opening in the carrier 26 and provide in effect a bearing orbushing forthe carrier as will be understood from Fig. 3. The teeth 39form in eiect a mutilated beveled pinion and this beveled pinionconstantly meshes with a small mutilated beveled gear 41 which ispivoted on a headed shoulder screw 42 that takes into the under side ofthe hub 6b, said gear projecting inward through an opening 43'in thevertical wall of the housing 6. rlhe gear 41 is provided with a hub 44over which is fitted an arm or lever 45, said arm being secured to theunder side of the beveled gear by one or more screws 46. The arm 45curves forward under the platen axle and its for- Vward end is bent orcurved-slightly'toward the left and'is provided with anV upstandingVyout of Y. engagement with the ratchet Awheel 16 by adjustable devicesso that the platen is normally disconnected from the pawl and may beturned by the linger wheels 19 without interference from'saidY pawl.VThese adjustable devices comprise a curved plate,

pawl stop or regulator 48 which slidably fits over the upper cylindricalportion of the housing 6 and is provided with tonguelike projections 49and 50. The projection 49 is at the front side of the plate 48 andcoperates with a slot or guide opening 51 formed in the rod 7l while theprojection or tongue 50 extends from the rear of the plate 48 andcoperates with a slot or guide opening 52 formed in the rod 7. A fingerpiece 53 projects upward from the regulater or stop plate 48 and affordsa convenient means of sliding the same backward and forward. The iingerpiece is bored out as indicated at 54 to receive a coiled spring thatpresses downward a ball detent 56 and tends to maintain said ball inengagement with one or another of three depressions or seats 57 formedin the curved face of the housing 6. The detent devices 56, 57 maintainthe plate 48 set in one or another` of three predetermined positionscorresponding with the three different extents of line space movement.The variation in the line space movement is brought about by means of aslot or opening formed in the plate 48 and comprising a narrow fore andaft portion 58 and a wider portion 59 connecting with the rear end ofthe portion 58. This slot overlies a larger cut-out or opening 60 formedin the housing 6. The slot 58, 59 coperates with a headed pin orprojection 61 which is supportedon the top of the pawl 28 and projectsupward through the opening 60 into the slot 58, 59. Normally the pawl isin the narrow portion 58 of the slot, its position lengthwise thereofbeing determined by the adjustment of the plate 48. It will beunderstood that the inner wall of the portion 58 coperates with the pin61 to resist the spring 30, the result being that the pawl is normallyheld upright and the tooth 34 is out of engagen'ient with the ratchetteeth 18. Then the linger piece 47 is operated., causing the carrier 26to swing toward the rear, the pin 6l will travel backward through thenarrow portion of the slot 58 until the wide portion 59 is reached,permitting the spring 30 to become effective and swing the pawl 28toward the left with the result that the tooth 34 is caused to engagewith the ratchet teeth 18 Yand during the remainder of the rearwardswing of the pawl carrier will cooperate with said teeth to turn theratchet wheel 16 and through it the platen 14. It will be understoodthat the extent of this turning movement will depend on the point in thestroke at which the pawl engages with the ratchet wheel and that thispoint is determined by the adjustment of the plate 48. lVhen the plateis in the forward one of its three positions, the rear portion of thenarrow slot 58 will be engaged with the pin 6l and said pin will have totravel a compa 1atively short distance befoi'e it enters the wideportion 59 of the slot, permitting the pawl to become operative. Theparts are adjusted so that when the plate is thus set three units ofline space distance will be communicated to the platen from the pawl andratchet mechanism. l/Vhen the plate 4S is set in its rearinost positionas determined by the detent devices comprising the ball 56 and therearmost depression 57, the pin 61 will have to traverse the greaterpart of the slot 58 ,before it enters the slot 59 with the result thatbut a. single unit of line space movement will be given the platen. Whenthe plate 48 is set in the middle position two units of line spacemovement will be communicated to the platen by the pawl and ratchetdevices. Preferably a cover plate 62 is secured over the plate 48 byscrews 63, thus covering the slot 58, 59 and pin 6l. To facilitate theproper adjustments of the line spacing devices, indicating devices areprovided comprising a pointer 64 formed by beveling or sharpening theforward end of the tongue 49. The pointer 64 coperates with suitableindicating marks or a scale on an indicator plate 65 screwed to thehousing 6. ln order that the pointer may slide over said plate 65 whichprojects outward from the face of the housing, the forward portion ofthe finger 49 is undercut as indicated at 66 (Fig. 2). 'llo limit thestroke of the pawl and ratchet devices a stop lug 67 is formed orsuitably secured to the inner face of the housing 6, said lug beingprovided with suitable faces G8 and 69 for cooperation respectively withthe rear upper portion of the carrier 26 and the beveled portion 33 ofthe pawl. These stop faces or stop devices may, of course, be madeseparate, if desired. The operation of the stop devices will be bestunderstood from a consideration of F ig. 6 which shows the pawl incooperation with the stop 67. rl`he stop, it will be understood,`servesnot only to positively limit by its face 68 a rearward movement of thecarrier, but also through its face 69 exerts a wedging action on thepawl, forcing it into a locking engagement with the engaged tooth 18' ofthe ratchet wheel 16 at the end of the pawl stroke. The variation inline space movement is effected without varying the movement of the pawland ratchet line spacing devices or the linger piece 47, the stroke ormovement being always uniform or constant, the variation in theeffective stroke of the pawl being caused by varying the point in itsfull or constant stroke at which it may engage with the line spacingratchet wheel.

rlhe present construction of the line spacing mechanism is simple andeffective and possesses the advantage of being contained within andcovered by a housing at one end of the platen, which housing is ofsubstantially the diameter of the platen, this construction conducing toa neat and attractive appearance of the parts and also covering theworking parts so that their liability to become displaced or disarrangedis minimized. The housing provides a suppoi't for the pawl carrier andpawl as well as for the operating arm or lever 45 and the connectionsbetween said arm and the pawl carrier, said connections comprising thegears 39 and 4l. This support being detachable, the entire line spacingmechanism excepting the ratchet wheel may be quickly removed from themachine.

'Various changes may be made without departing from my invention.

lill/'hat I claim as new and desire to secure by Letters Patent, is

l. ln a typewriting machine, the combination of a platen, a ratchetwheel connected thereto, a hand-actuated pawl-carrier having separatedarms, a pawl mounted between said arms and having one end loZenge-shapedso that one beveled portion formed thereby may cooperate with saidratchet wheel, and a fixed stop with which another beveled portion ofsaid loZengc-shaped end may c0- operate.

2. ln a typewriting machine, the combination of a rotary platen, a linespacing ratchet wheel connected therewith, a pawl carrier mountedco-axially with said ratchet wheel, a pawl pivoted on said carrier atright angles to the carrier axis, hand actuated means for communicatingan unvarying extent of rotary movement to said pawl carrier, springmeans tending constantly to press said pawl toward said ratchet wheel,and adjustable means for varying the point in the stroke at which saidspring means becomes effective, said adjustable means comprising asettable slotted plate and a projection on said pawl engaging saidplate.

ln a typewriting machine, the combination of a rotary platen, a linespacing ratchet wheel connected therewith, a cylindrical housing at oneend of the platen and containing said ratchet wheel, a pawl carrier, apawl thereon, means for actuating said pawl, and a pawl regulatormounted on said housing, said pawl carier and said pawl being containedwithin said housing.

4. In a typewriting machine, the combination oi: a platen frame, arotary platen, a line spacing ratchet wheel connected therewith, acylindrical cap detachably mounted on said platen frame, a pawl cariier,a pawl thereon, a hand lever, and connections between said hand leverand said pawl carrier, said pawl carrier, said hand lever and saidconnections being mounted on said cap.

5. ln a typewriting machine, .the combina- CIK tion of a platen frame, arotary platen, a line spacing ratchet wheel connected therewith, acylindrical housing detachnbly mounted on seid platen frame, e pawlcarrier, a pztwl thereon, a hand lever, and connections between Seidhand lever and said pnwl carrier, said pztwl carrier, seid hand leverund Said connections being,` mounted on said housing, and said pawlcarrier and said pewl being contained within said housing.

6. ln a. typewrting` machine, the combinationV of e platen frame, ztrotary platen, a line spacing ratchetwheel connected therewith, ncylindrical cap detachably mounted on said platen frame, a pawl carrier,a paWl thereon, e hand lever, and connections comprising a pair ofconstantly meshing gears between seid hand lever und said pewl carrier,seid pawl carrier, Suid gears and said hand lover being mounted on saidcap.

Signed at the borough of" Manhattan, city of New York, in the count)T ofNew York, and State of New York, this 1st (luy oit December, A. D.1914-.

CLIO B. YnlV.

lVitnesses L. NELSON, CHARLES E. SMITH.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

' Washington, D. C.

